root@clearfogpro:~# cat /boot/armbianEnv.txt
verbosity=1
emmc_fix=off
spi_workaround=off
eth1addr=02:8F:54:B0:59:D0
eth2addr=00:50:43:84:25:2f
eth3addr=00:50:43:0d:19:18
rootdev=UUID=42d8e1a3-7601-4e06-88ae-e0513bdad090
rootfstype=ext4


After first boot with fresh image:
root@clearfogpro:~# ip link show eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1024
    link/ether 00:50:43:25:fb:84 brd ff:ff:ff:ff:ff:ff

After one reboot:
root@clearfogpro:~# ip link show eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1024
    link/ether 02:8f:54:b0:59:d0 brd ff:ff:ff:ff:ff:ff